CRM Unique ID

CRM Unique ID

I would like to pass the Unique ID of a Potential to an external program so that I can then use the API to query the CRM using the getRecordByID() function.   My thought is to create a custom link that calls my external program but the ID field is not one of the fields that I can select and pass. 
 
Is there a way to do this?
 
Thanks.